# -*- coding: utf-8 -*-

# Define your item pipelines here
#
# Don't forget to add your pipeline to the ITEM_PIPELINES setting
# See: https://doc.scrapy.org/en/latest/topics/item-pipeline.html
import pymysql
from douban.items import DoubanItem
class DoubanPipeline(object):
    def open_spider(self, spider):
        self.coon = pymysql.connect('127.0.0.1', 'root', '123456', 'douban', charset='utf8')
        self.cursor = self.coon.cursor()

    def process_item(self, item, spider):
        # 判断item类型,写入对应的数据库
        try:
            if isinstance(item,DoubanItem):
                sql, data = item.save_to_mysql()
                self.cursor.execute(sql, data)
                self.coon.commit()
                print('--------日记写入成功--------')
                return item
        except Exception as e:
            print('写入失败,原因%s' % e)

    def close_spider(self, spider):
        self.cursor.close()
        self.coon.close()
